SCOTT SIMON, HOST:
And as Peter mentioned, rebel fighters in Syria have shown a surprising military capability over the past few days. And now, there's a major push to organize, as NPR's Deborah Amos reports.
DEBORAH AMOS, BYLINE: As fighting intensifies in the Syrian capital, there's an urgent effort under way to organize the rebel fighting force.
FIAZ AMBRO: (Foreign language spoken)
AMOS: That's Lt. Gen. Fiaz Ambro, speaking by phone from a camp on the Turkish border for top Syrian military defectors. He says 20 senior officers have formed a new military council.
AMBRO: (Foreign language spoken)
AMOS: There's been a shake-up in the command of the Free Syrian Army, says Lt. Gen. Ambro.
AMBRO: (Foreign language spoken)
AMOS: The Muslim Brotherhood, who've become a dominant force in Syria's fragmented opposition, agrees that a military reorganization is needed now. Molhelm Al Drobi is a member of the Brotherhood's leadership.
MOLHELM AL DROBI: What's important is that the people are talking to each other. Outsiding(ph) moderators are trying to play role to unify the officers under one umbrella.
AMOS: Rebel commanders confirm unity talks have accelerated over the past few days. Many agree a unified command is now crucial. The Free Syrian Army has been an army in name only, says this rebel, Abu Amar, who expressed the frustration of many fighters inside Syria, with officers outside.
ABU AMAR: We don't take any order of them. We don't listen to them and actually, we don't have any real communication with them.
AMOS: This barely furnished apartment, in southern Turkey, serves as headquarters for a brigade fighting in a province on Syria's northern border. Some fighters sleep draped over couches; others watch the news, drink sweet tea and smoke. This brigade began with local army defectors and civilians who sold land, cars and houses - anything of value - to buy arms.
Nidal Dura Mohammed, part of the brigade's leadership, echoes the call for a new command.
NIDAL DURA MOHAMMED: We need our officers to take their correct places in the revolution because until now, the battle for falling down the regime not stopped.
AMOS: He says there's a tough fight ahead, but many fear there will also be chaos. Mohammed Fiso is the logistics chief for the Farouk Brigade, one of the most respected rebel groups. It now controls the town of Rastan, in central Syria.
MOHAMMED FISO: (Through Translator) We are afraid after that - after the fall of the regime - we will enter a civil war.
AMOS: It's a widespread fear that the hundreds of groups fighting the regime will turn on each other, in a struggle for power. Fiso supports some military authority to disarm the militias, once the Assad regime has been ousted.
FISO: (Through Translator) So the idea is that to avoid different groups fighting other groups, they should all give back their weapons once the regime has fallen.
AMOS: That will be very difficult. Anyone can become a rebel; all it takes is money. And not all of them serve under the banner of the Free Syrian Army. There are al-Qaida-style radicals - conservative Muslims called Salafis, who get support from private Arab donors in the Gulf. The Muslim Brotherhood also funds brigades, and there are local secular groups. Some brigades only accept army defectors, and impose strict military discipline.
Abu Bashar is a logistics chief for one brigade of defectors. His financial backers - he refuses to identify them - insist he keeps track of every bullet, registering the serial numbers of all the smuggled arms.
ABU BASHAR: (Through translator) Once a week, they get a document - a columned Excel sheet - with the military operation carried out, and the type of weapons that were bought.
AMOS: Many of the rebel groups follow the same procedures, to account for the weapons after the regime falls. But with so many weapons now in Syria, Abu Bashar says there is much more trouble ahead. Deborah Amos, NPR News.